Variability in meteorological parameters and their impact on evapotranspiration in a humid zone of Pakistan

Meteorological applications

article

Shahzada Adnan¹  Kalim Ullah¹  Rehan Ahmed¹ 

[1] Department of Meteorology, COMSATS University Islamabad;National Drought Monitoring and Early Warning Centre, Pakistan Meteorological Department

关键词: climate change;    evapotranspiration;    humid zone;    hydrological cycle;   

DOI  :  10.1002/met.1859

学科分类：社会科学、人文和艺术（综合）

来源: Wiley

【 摘 要 】

Phenol is one of the serious pollutants from the chemical and petrochemical industries. This pollutant due to its convoluted structure is resistant to biodegradation. One of the methods that are useful to remove this pollutant is advanced oxidation (AOP). A laboratory scale study was done on a synthetic wastewater containing phenol. All experiments were done in batch conditions and effect of variables pH, amount of hydrogen peroxide, iron dosage, contact time and an initial concentration on the phenol removal were tested. The remaining phenol concentration was evaluated using the DR-5000 device. In order to effect of these parameters, the experiment was performance at pH 2 to 6, 5 to 45 ml/ml of peroxide, and time of 5 to 60 minutes with 2 to 15 g/ml iron (Fe˚). The optimum pH, the ratio of hydrogen, Fe˚and time were 3, 15 ml, 8g and 5 minutes respectively. Chemical oxygen demand (COD) index was chosen as the parameter for evaluation in this study. Result showed that mineralization of phenol was not complete. The COD removal efficiency was obtained 71%. According to the results of this study, Fenton-like process can be used for conversion organic resistant compounds to other compounds with lower toxicity.

【 授权许可】

CC BY|CC BY-NC|CC BY-NC-ND